/**
 * @license Copyright (c) 2003-2023, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
 */
import { Plugin } from 'ckeditor5/src/core';
import ImageUtils from '../imageutils';
/**
 * The image caption utilities plugin.
 */
export default class ImageCaptionUtils extends Plugin {
    /**
     * @inheritDoc
     */
    static get pluginName() {
        return 'ImageCaptionUtils';
    }
    /**
     * @inheritDoc
     */
    static get requires() {
        return [ImageUtils];
    }
    /**
     * Returns the caption model element from a given image element. Returns `null` if no caption is found.
     */
    getCaptionFromImageModelElement(imageModelElement) {
        for (const node of imageModelElement.getChildren()) {
            if (!!node && node.is('element', 'caption')) {
                return node;
            }
        }
        return null;
    }
    /**
     * Returns the caption model element for a model selection. Returns `null` if the selection has no caption element ancestor.
     */
    getCaptionFromModelSelection(selection) {
        const imageUtils = this.editor.plugins.get('ImageUtils');
        const captionElement = selection.getFirstPosition().findAncestor('caption');
        if (!captionElement) {
            return null;
        }
        if (imageUtils.isBlockImage(captionElement.parent)) {
            return captionElement;
        }
        return null;
    }
    /**
     * {@link module:engine/view/matcher~Matcher} pattern. Checks if a given element is a `<figcaption>` element that is placed
     * inside the image `<figure>` element.
     * @returns Returns the object accepted by {@link module:engine/view/matcher~Matcher} or `null` if the element
     * cannot be matched.
     */
    matchImageCaptionViewElement(element) {
        const imageUtils = this.editor.plugins.get('ImageUtils');
        // Convert only captions for images.
        if (element.name == 'figcaption' && imageUtils.isBlockImageView(element.parent)) {
            return { name: true };
        }
        return null;
    }
}
